

 to result in the saving of a considerable anount of IB reliant 



a"blo material which uncor ordinary condj ions would not "be 

 cut for the reason th:,t the trees froi.i which it is derived 

 uiidor our old system of marking would "be considered so de- 

 fective that the operator could not justly "be required to 

 talie then out. 



The principles followed on tho ICLanath marking were 

 vei~3r similar to those just outlined osoept that in the 

 pure Douglas fir tjr-e which was there encountered, it was 

 found naoess~r;7 to locate the /vroups to he lafu so mo what 

 more arbitrarily than in the 3ierra narl:inf; for the reason 

 that tho stand was very largely oven aged leaving room for 

 "but little discretion in the selection of the groups. 

 Under these oircnmcjtan^os the ^roups cut wero ofcen as 

 lar^c as three or iovjr acres and groups loit uoro sometiraes 

 as small e,s one-cuaitor of an acre. It wac often necessary 

 also, to loc?,ve larf : ;o diseased troes r/ithin the groups since 

 to tal:e them out v/ould have caused a destruction of other 

 trees owing to the density of the stand. 

 10:10 llarlriny Principles in Use on Plunas. 

 02: 



Briefly stated, the principles of i marlring 



employed on the Plumas are group and selection, or a com- 

 bination of the two. The stands of timber that are found 

 on the Plumas do not, as a whole, permit of a rigid adher- 



229 



